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TVS - Diodes: SAC5.0-E3/73 Application Field and Working Principle

Transient Voltage Suppressor (TVS) Diodes, also known as Transil diodes, are an important component in circuit protection against transient overload spikes. SAC5.0-E3/73 is one of the most common type of TVS-Diode, widely used in various applications. This paper aims to provide an overview of the application and working principle of SAC5.0-E3/73.

Application of SAC5.0-E3/73

SAC5.0-E3/73 has wide variety of applications, such as in automotive electronic control units, power supplies, telecommunication systems, electric devices, medical instruments, computer boards and industrial control systems. It is used as a surge protection component in applications that require a relatively low breakdown voltage, low leakage current, good alternation current capacity and excellent surge performance.

Working Principle of SAC5.0-E3/73

The SAC5.0-E3/73 is an asymmetrical silicon-based diode. It is composed of three main parts, the semiconductor wafer, the drain contact and the anode contact. It has a low clamping voltage of 5V, which means it is able to withstand a voltage surge up to 5V. During a surge, its on-state resistance is very low, allowing the surge current to pass through the diode quickly. Once the current surge has passed, the diode is reset to its open state, meaning it is no longer conductive.

When the SAC5.0-E3/73 is used for ESD protection, it acts as a protective shunt, redirecting the high current surge away from other parts in the circuit. It is able to absorb the pre-defined peak power and energy of the transient surge, thus protecting the system from damaging events, such as electrostatic discharge.

When used together with bipolar transistors, the SAC5.0-E3/73 functions as a reverse blocking element in order to prevent any reverse current flow in the circuit. Since it is relatively stable during short-term surges and disturbances, it can provide a constant and stable reverse blocking voltage in the voltage clamping range.

Conclusion

In conclusion, SAC5.0-E3/73 is a reliable and cost-effective TVS-diodes designed to provide over-voltage protection for various applications. It is characterized by its low on-state resistance and low clamping voltage, making it an ideal choice for circuit protection from transient overloads. Its working principle is simple, yet highly effective in preventing damage from surges and ESD.

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